Gear pump 1 delivers fluid at constant pressure to the left end of cylinder 3, and piston 4, together with machine tool table 5, travels to the right. Fluid discharged from the right end of cylinder 3 passes through pressure reducing valve 6 and flow-control valve 7. Reducing valve 6 maintains constant fluid pressure before flow-control valve 7. The pressure in the right end of cylinder 3 is set up by means of valve 7 to obtain the required speed of piston 4 and table 5. As flow-control valve 7 is closed, the pressure of the fluid in the system increases. This shifts valve member 2 to the right, compressing the spring, and a part of the fluid delivered by pump 1 drains back to the tank.
$4144$CHP,Dr$